<![CDATA[The aim of this research was to produce an effective worksheet based problem based learning model in social studies for the fourth grade students of elementary school. The method of this research used research and development method with eight step included potential and problems, data colecting, product design, design validation, design revision, limited product testing, product revision and expanded used trials. The collecting data used questionnaire, multiple choice and description. The data were analyzed by using N-Gain formula. The research saw that worksheet based problem based learning model was effective to improve learning outcome in social studies for the fourth grade of elementary school.Tujuan penelitian ini untuk menghasilkan produk bahan ajar LKS berbasis model problem based learning pada mata pelajaran IPS yang efektif bagi siswa kelas IV SD. Metode yang digunakan adalah penelitian dan pengembangan dengan delapan tahapan meliputi potensi masalah, pengumpulan data, desain produk, validasi desain, revisi desain, uji coba produk terbatas, revisi produk dan uji coba pemakaian diperluas. Alat pengumpul data menggunakan lembar angket, soal pilihan ganda dan uraian. Data dianalisis menggunakan rumus N-Gain. Hasil penelitian menunjukkan bahwa LKS berbasis model problem based learning efektif digunakan untuk meningkatkan hasil belajar pada mata pelajaran IPS di Kelas IV SD.Kata Kunci : problem based learning, LKS, hasil belajar.]]>
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